AIPS HELP file for VLBACRPL in 31DEC22
As of Fri Dec 1 13:01:51 2023
VLBACRPL: Procedure to plot cross power spectrum
INNAME Input UV file name (name)
INCLASS Input UV file name (class)
INSEQ 0.0 9999.0 Input UV file name (seq. #)
INDISK 0.0 9.0 Input UV file disk unit #
SOURCES Sources to plot
TIMERANG Time range of a calibrator
1-4 = start day,hr,min,sec
5-8 = end day,hr,min,sec
SUBARRAY 0.0 1000.0 Subarray, 0=>1
REFANT 0.0 20.0 Reference antenna; 0=> 1
STOKES Stokes' parameters to plot
GAINUSE CL table to use; 0=>highest
< 0 => no cal. applied
SOLINT >0 defines averaging time
for each plot. If -1 and
an NX table exists, will
do scan averages.
DOTV -1.0 1.0 =1 plot to TV, <=0 make plot
Use: VLBACRPL plots cross-power spectrum to the AIPS TV
calibrated with the CL table states in GAINUSE.
Type RUN VLBAUTIL to make the VLBACRPL procedure
INNAME.....Input UV file name (name). Standard defaults.
INCLASS....Input UV file name (class). Standard defaults.
INSEQ......Input UV file name (seq. #). 0 => highest.
INDISK.....Disk drive # of input UV file. 0 => any.
SOURCES....Sources to plot. If any names begins with a '-'
all sources listed are deselected (i.e. all others
TIMERANG...Time range to plot. In order:
Start day, hour, min. sec,
End day, hour, min. sec. Days relative to
SUBARRAY...Subarray number to select. 0=>1.
REFANT.....Reference antenna, 0 => the first in the antenna list
STOKES.....The desired Stokes type of the output data:
'LR','HALF' (=RR,LL), 'FULL' (=RR,LL,RL,LR)
blank = 'I'
GAINUSE....Number of CL table that you wish to be applied in the
0 => highest; < 0 => no calibration applied.
SOLINT.....If SOLINT > 0 then the user can make multiple plots per
pass of POSSM. All other parameters will be obeyed. POSSM
will start at TIMERANGE, make a plot covering the range
TIMERANGE + SOLINT, etc. The units of SOLINT are minutes.
If SOLINT = -1 then POSSM will make scan averages starting
at scan nearest to the start time specified in TIMERANGE
and finishing at the scan end closest in time to the stop
time specified in TIMERANGE. If TIMERANGE is all zero then
every scan will be averaged and plotted. This function is
predicated, of course, on there being an NX table in order
to determine the scan boundaries. The data must be in time
order for SOLINT not 0.
DOTV.......> 0 => plot directly on the TV device, otherwise make a
plot file for later display on one or more devices
(including the TV if desired).
VLBACRPL: Procedure to plot the crosspower spectrum
Documenter: Amy Mioduszewski
Related Programs: VLBAUTIL, POSSM, VLBASNPL
To check the calibration, this should be done often during the
calibration process. Particularly after correcting the instrumental
phases (VLBAPCOR) and fringe fitting (VLBAKRNG, VLBAFRNG, VLBAKRGP
or VLBAFRGP). It is useful to see how the phases change with
every step of the process.
Steps in VLBACRPL:
Runs POSSM, plotting the cross-power spectrum, using:
BASELINE = REFANT, 0;
APARM 0, 1, 0, 0, -180, 180, 0, 0, 1, 0; NPLOT= 9 or
# of antennas, whichever is smaller.